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26 June, 18:56

indicators are chemicals that change colour in presence of an acid or an alkali. Universal indicators and pH meters are used to measure pH. Desccribe how you would use a universal indicator to find the pH of sodium hydroxide. What colour change would you observe

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  1. 26 June, 19:58
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    Purple. Sodium Hydroxide is an Alkali/base. Bases and Alkalis

    have a pH greater than 7, and turn blue-purple in universal

    indicator.
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